Looking at change out the coolant sensor car is over heating but first it will blow cool air before it over heats when it finals blows hot air and the therostate opens up it goes back down we have changed the therostate need to change before the head caste blows

Dear Over Heating, What this sounds like to me is not a coolant sensor issue.You need to first check the level of coolant(antifreeze), and make sure it's at the appropriate level so you can rule that out.Be sure to check this cold so you don't scald yourself.If the coolant was low then there is a air bleeding procedure to get the air out of the cooling system on this vehicle.If you have the chilton manual then you can abide by that guide,Also get a little visual between the lower intake manifold and the head.See if you can see and coolant streaming down in that area on either front or rear side, these vehicles are notorious for this problem if not then get back to me,Chan I'm here to help!!! Dear Over Heating, What this sounds like to me is not a coolant sensor issue.You need to first check the level of coolant(antifreeze), and make sure it's at the appropriate level so you can rule that out.Be sure to check this cold so you don't scald yourself.If the coolant was low then there is a air bleeding procedure to get the air out of the cooling system on this vehicle.If you have the chilton manual then you can abide by that guide,Also get a little visual between the lower intake manifold and the head.See if you can see and coolant streaming down in that area on either front or rear side, these vehicles are notorious for this problem if not then get back to me,Chan I'm here to help!!!